NEC Neax 2000 Ivs2 Ccis System Manual

							 NEAX2000 IVS2 CCIS System ManualPage 308  ND-70918 (E), Issue 1.0
CHAPTER 5  OPERATION TEST
LOOP-BACK TEST
Table 5-2  Alarm Indications on the 30DTI Card (Loop-Back Test)
LEDLED INDICATION FAULT
NORMAL FAULT CAUSE ACTION
RU N F la s h
(120 IPM)On or Off Abnormal 
operation of DTI 
cardConfirm the programming data: 
CM05, CM07 YY=01.
Check to see if the SENS 
switch is set as per the AP 
number (04-15, 20-31) 
assigned by CM05.
Reset the MB switch 
(Down→Up→Down)
If the fault cannot be cleared, 
replace the card.
PCM Off On No PCM signals 
arrive from the 
distant officeCheck to see if the DTI cable is 
correctly connected.
Plug and unplug the DTI card.
Repeat this two or three times.
FRM Off On Frame Alignment 
signals from the 
distant office can 
not be receivedCheck the receive line and 
external equipment.
Replace the remote DTI card.
MFRM Off On Multi Frame 
Alignment signals 
from the distant 
office can not be 
receivedCheck the receive line and 
external equipment.
Replace the remote DTI card.
RMT Off On Frame Alignment 
signals cannot be 
sent to the remote 
PBXCheck the transmission line 
and external equipment.
Replace the DTI card.
MRMT Off On Frame Alignment 
signals from the 
distant office can 
not be receivedConfirm the switch setting on 
the DTI card indicating an 
alarm.
Replace the DTI card not 
indicating an alarm, with a 
spare.
AIS Off On Remote PBX is in 
the loop-back testCheck the switch settings of the 
remote DTI card.1
2
3
4
1
2
1
2
1
2
1
2
1
2
1 
						

							CHAPTER 5  OPERATION TEST
LOOP-BACK TEST
NEAX2000 IVS2 CCIS System Manual    
ND-70918 (E), Issue 1.0   Page 309
STEP 4: With respect to channels assigned as trunks, perform call origination and call
termination tests. Prior to the performance test, make busy all trunks other than the
test trunk by means of CME5.
Dial the trunk route access code and a station number. In the case of a loop-back test,
the same BL lamp lights up on the calling-side DTI card and the called-side DTI card.
Talk with the called side and confirm that there is no noise nor distortion. Perform this
test from both digital and analog stations if available.
STEP 5: Reassign the system data, as needed.
STEP 6: Turn off the operating power and disconnect the loop-back test cable. Then, connect
the transmission line cable. 
						

							 NEAX2000 IVS2 CCIS System ManualPage 310  ND-70918 (E), Issue 1.0
CHAPTER 5  OPERATION TEST
Interoffice Transmission Line Test
INTEROFFICE TRANSMISSION LINE TEST
To confirm inter-office synchronization and speech quality using “In-Service” transmission lines,
do the following steps.
STEP 1: Connect the transmission line to the MDF or CONN card.
STEP 2: Make busy the channels except the channel tested by CME5.
STEP 3: Confirm indication lamps on the DTI card, as per the following table.
Alarm Indications on the 24DTI Card (Loop-Back Test) on Page 307
Alarm Indications on the 30DTI Card (Loop-Back Test) on Page 308
STEP 4: Originate an outgoing call via trunk.
STEP 5: After an outgoing connection via trunks has been established, confirm inter-office
synchronization as follows:
On the DTMF telephone set, keep pressing any dial button.
Check to see if there are noise or abnormal tones.
Do the above test again in the opposite direction.
STEP 6: Repeat the test for all channels. When completed, make idle all channels by CME5. 
						

							CHAPTER 5  OPERATION TEST
Interoffice Transmission Line Test
NEAX2000 IVS2 CCIS System Manual    
ND-70918 (E), Issue 1.0   Page 311
Table 5-3  Alarm Indications on 24DTI (Interoffice Transmission Line Test)
LEDLED INDICATION FAULT
NORMAL FAULT CAUSE ACTION
RU N F la s h
(120 IPM)On or Off Abnormal 
operation of DTI 
cardConfirm the programming data: 
CM05, CM07 YY=01.
Check to see if the SENS 
switch is set as per the AP 
number (04-15, 20-31) 
assigned by CM05.
Reset the MB switch 
(Down→Up→Down)
If the fault cannot be cleared, 
replace the card.
CRC Off On Bit Error Rate 
exceeds the 
predetermined 
valueCheck the receive line and 
external equipment.
Replace the remote DTI card.
PCM Off On No PCM signals 
arrive from the 
distant officeCheck to see if the DTI cable is 
correctly connected.
Plug and unplug the DTI card.
Repeat this two or three times.
FRM Off On Frame Alignment 
signals from the 
distant office can 
not be receivedCheck the receive line and 
external equipment.
Replace the remote DTI card.
RMT Off On Frame Alignment 
signals cannot be 
sent to the remote 
PBXCheck the transmission line 
and external equipment.
Replace the DTI card.
AIS Off On Remote PBX is in 
the loop-back testCheck the switch settings of the 
remote DTI card.1
2
3
4
1
2
1
2
1
2
1
2
1 
						

							 NEAX2000 IVS2 CCIS System ManualPage 312  ND-70918 (E), Issue 1.0
CHAPTER 5  OPERATION TEST
Interoffice Transmission Line Test
Table 5-4  Alarm Indications on 30DTI (Interoffice Transmission Line Test)
LEDLED INDICATION FAULT
NORMAL FAULT CAUSE ACTION
RU N F la s h
(120 IPM)On or Off Abnormal 
operation of DTI 
cardConfirm the programming data: 
CM05, CM07 YY=01.
Check to see if the SENS 
switch is set as per the AP 
number (04-15, 20-31) 
assigned by CM05.
Reset the MB switch 
(Down→Up→Down)
If the fault cannot be cleared, 
replace the card.
PCM Off On No PCM signals 
arrive from the 
distant officeCheck to see if the DTI cable is 
correctly connected.
Plug and unplug the DTI card.
Repeat this two or three times.
FRM Off On Frame Alignment 
signals from the 
distant office can 
not be receivedCheck the receive line and 
external equipment.
Replace the remote DTI card.
MFRM Off On Multi Frame 
Alignment signals 
from the distant 
office cannot be 
receivedCheck the receive line and 
external equipment.
Replace the remote DTI card.
RMT Off On Frame Alignment 
signals cannot be 
sent to the remote 
PBXCheck the transmission line and 
external equipment.
Replace the DTI card.
MRMT Off On Frame Alignment 
signals from the 
distant office can 
not be receivedConfirm the switch setting on 
the DTI card indicating an 
alarm.
Replace the DTI card not 
indicating an alarm, with a 
spare.
AIS Off On Remote PBX is in 
the loop-back testCheck the switch settings of the 
remote DTI card.1
2
3
4
1
2
1
2
1
2
1
2
1
2
1 
						

							CHAPTER 5  OPERATION TEST
PLO Operation Test
NEAX2000 IVS2 CCIS System Manual    
ND-70918 (E), Issue 1.0   Page 313
PLO OPERATION TEST
To confirm the PLO operation do the following tests.
Clock Signal Generation Test
Clock  Signal  Synchronization  Test To be tested when the PBX is a clock receiver office.
Interoffice Synchronization Test
Source Office Mode Test To be tested when the PBX is a clock source office.
Clock Signal Generation Test
This test checks to see if the PLO keeps generating clock signals at the frequency of the previous
source clock, when the source clock signal from network have stopped. Do the following steps
using “In Service” transmission lines.
STEP 1: On all the DTI cards mounted in PIM0, set the switches as follows to stop the external
clock signal input.
30DTI card: SW-1 and SW-2 to OFF
24DTI card: SW0-1 and SW0-2 to OFF
– The CLK lamp on the MP card goes out.
STEP 2: Originate an outgoing call via trunks.
STEP 3: After an outgoing connection via trunks has been established, confirm interoffice
synchronization and speech quality as follows:
On the DTMF telephone set, keep pressing any dial button.
Check to see if noise periodically occurs on the DTMF signals coming from the call-
ing station in the opposite office.
Do the above test again in the opposite direction.
STEP 4: On all the DTI cards mounted in PIM0, restore the switches as the state before testing
to input the external clock signals.
– The CLK lamp on the MP card lights.
NOTE:If noise periodically occurs, replace the MP card after checking the switch settings on
the MP card, and do the above test again. 
						

							 NEAX2000 IVS2 CCIS System ManualPage 314  ND-70918 (E), Issue 1.0
CHAPTER 5  OPERATION TEST
PLO Operation Test
Clock Signal Synchronization Test
This test checks to see if the PLO keeps synchronizing with the external clock signals, when the
external clock signals from network has input again after it has stopped once. Do the following
steps using “In Service” transmission lines.
(1) When providing one clock supply route 
STEP 1: On the DTI0 card extracting clock signals, set the SW-1 and SW-2 to OFF to stop the
external clock signal input.
– The CLK lamp on the MP card goes out.
STEP 2: Originate an outgoing call via trunk.
STEP 3: After an outgoing connection via trunk has been established, confirm interoffice
synchronization and speech quality as follows:
On the DTMF telephone set, keep pressing any dial button.
Check to see if noise periodically occurs on the DTMF signals coming from the call-
ing station in the opposite office.
Do the above test again in the opposite direction.
STEP 4: On the DTI0 card, restore the switches as the state before testing to input the external
clock signals.
30DTI0 card: SW-1 to ON, SW-2 to OFF
24DTI0 card: SW0-1 to ON, SW0-2 to OFF
– The CLK lamp on the MP card lights.
STEP 5: Originate an outgoing call via trunks.
STEP 6: After an outgoing connection via trunks has been established, confirm interoffice
synchronization and speech quality with the procedure shown in STEP 3.
NOTE:If noise periodically occurs, replace the MP card after checking the switch settings on
the MP card, and do the above test again. 
						

							CHAPTER 5  OPERATION TEST
PLO Operation Test
NEAX2000 IVS2 CCIS System Manual    
ND-70918 (E), Issue 1.0   Page 315
(2) When providing two clock supply routes
STEP 1: On the DTI cards extracting clock signals, set the switches as follows to change the
clock supply route from 0 to 1.
30DTI0 card: SW-1 to OFF, SW-2 to OFF
30DTI1 card: SW-1 to OFF, SW-2 to ON
24DTI0 card: SW0-1 to OFF, SW0-2 to OFF
24DTI1 card: SW0-1 to OFF, SW0-2 to ON
STEP 2: Originate an outgoing call via trunks.
STEP 3: After an outgoing connection via trunks has been established, confirm interoffice
synchronization and speech quality as follows:
On the DTMF telephone set, keep pressing any dial button.
Check to see if noise periodically occurs on the DTMF signals coming from the call-
ing station in the opposite office.
Do the above test again in the opposite direction.
STEP 4: On the DTI cards, set the switches as follows to stop the external clock signal input.
30DTI0/1 card: SW-1 and SW-2 to OFF
24DTI0/1 card: SW0-1 and SW0-2 to OFF
– The CLK lamp on the MP card goes out.
STEP 5: Repeat the procedure shown in STEP 2 and STEP 3.
STEP 6: On the DTI0/1 cards, set the switches as shown in STEP 1 to input clock signals from
the clock supply route 1.
STEP 7: Repeat the procedure shown in STEP 2 and STEP 3.
STEP 8: On the DTI cards, set the switches as follows to change the clock supply route from 1
to 0.
30DTI0 card: SW-1 to ON, SW-2 to OFF
30DTI1 card: SW-1 to OFF, SW-2 to ON
24DTI0 card: SW0-1 to ON SW0-2 to OFF
24DTI1 card: SW0-1 to OFF, SW0-2 to ON
– The CLK lamp on the MP card lights. 
						

							 NEAX2000 IVS2 CCIS System ManualPage 316  ND-70918 (E), Issue 1.0
CHAPTER 5  OPERATION TEST
PLO Operation Test
STEP 9: Repeat the procedure shown in STEP 2 and STEP 3.
NOTE:If noise periodically occurs, replace the MP card after checking the switch settings on
the MP card, and do the above test again.
Interoffice Synchronization Test
This test checks to see if noise occurs while calling with the opposite office, by difference of the
clock signal frequency between the offices. Do the following steps using “In Service”
transmission lines.
STEP 1: Originate an outgoing call via trunks.
STEP 2: Check the speech quality (if noise, distortion or click occurs during a few minutes) with
the opposite office mutually.
STEP 3: On the DTMF telephone set, keep pressing any dial button, and check to see if noise
periodically occurs on the DTMF signals coming from the calling station in the opposite
office.
STEP 4: Do the above test again in the opposite direction.
NOTE:If noise periodically occurs, replace the MP card after checking the switch settings on
the MP card, and do the above test again.
Source Office Mode Test
When the PBX is operated as a clock source office, do the following steps using “In Service”
transmission lines.
STEP 1: Confirm that the following switches on all the DTI cards mounted in PIM0 are set to
“OFF”.
30DTI card: SW-1 and SW-2 to OFF
24DTI card: SW0-1 and SW0-2 to OFF
STEP 2: Confirm the following switches on the MP card are set to “OFF”.
SW2-2 and SW2-3 to OFF
SW4-2 and SW4-3 to OFF 
						

							CHAPTER 5  OPERATION TEST
PLO Operation Test
NEAX2000 IVS2 CCIS System Manual    
ND-70918 (E), Issue 1.0   Page 317
STEP 3: Confirm indication lamps on the MP card.
NOTE:When the CLK lamp lights on the MP card, the clock signal is not generated from the
MP card. Check the switch settings on the DTI and MP card.
For details of the lamp indications, refer to CHAPTER 4 on Page 259.
STEP 4: Originate an outgoing call via trunks.
STEP 5: After an outgoing connection via trunk has been established, confirm interoffice
synchronization and speech quality as follows:
On the DTMF telephone set, keep pressing any dial button.
Check to see if noise periodically occurs on the DTMF signals coming from the call-
ing station in the opposite office.
Do the above test again in the opposite direction.
NOTE:If noise periodically occurs, replace the MP card after checking the switch settings on
the DTI and MP card, and do the above test again.